After five years, Apple's App Store has 900,000 apps available, with 350,000 of those specifically made for the iPad.
With that kind of volume, it takes a lot to get noticed, but a few developers have managed to do it with great success. Out of the 350,000 iPad apps, these 10 have risen to the top of the pile. Here's a look at the 10 highest-grossing iPad apps, according to Apple -- though the company didn't release the numbers for how much each app made.
Starting at No. 10 is Bingo Bash HD - Free Bingo Casino, which touts itself as "The #1 BINGO game in the world" with more than 2 million people playing every day.